Cheapest return flights from Ontario to Las Vegas in May from $250

AirHint found the following cheapest return flights from Ontario (ONT) to Las Vegas (LAS) in May 2026 (see full year).

Return flights

29 May - 30 May Southwest Airlines
08 May - 11 May Southwest Airlines direct
04 May - 07 May Southwest Airlines direct
12 May - 19 May Southwest Airlines
01 May - 18 May Southwest Airlines direct
31 May - 03 Jun Southwest Airlines

Also check the deals for one-way flights from Ontario to Las Vegas in May.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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